function quit(){
    alert("还没查看就走掉?\n点击进入进行查看")
}
function show_prompt(){
    var face=prompt("请输出入您需要查看的脸型","例如:'圆型脸','长型脸','椭圆型脸','方型脸','三角型脸','瓜子脸'");
    switch (face) {
        case "圆型脸":
            document.getElementById('result').innerHTML="<div><img src='images/l1.png'></div>"
            break;
        case "长型脸":
            document.getElementById('result').innerHTML="<div><img src='images/l2.png'></div>"
            break;
        case "椭圆型脸":
            document.getElementById('result').innerHTML="<div><img src='images/l3.png'></div>"
            break;
        case "方型脸":
            document.getElementById('result').innerHTML="<div><img src='images/l4.png'></div>"
            break;
        case "三角型脸":
            document.getElementById('result').innerHTML="<div><img src='images/l5.png'></div>"
            break;  
        case "瓜子脸":
            document.getElementById('result').innerHTML="<div><img src='images/l6.png'></div>"
            break;
        default:
            alert("请检查输入是否错误")
            break;
    }
}